Attenuation of the acoustic noise radiated by a compressible boundary layer through injection of a vibrationally active gas

The effects of vibrational nonequilibrium processes on turbulence-generated acoustic noise were investigated in a Mach-2.8 shock-tunnel facility. Gas mixtures with relevant absorption characteristics were first identified from measurements of attenuation coefficients using a heated acoustic chamber....

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Veröffentlicht in:	Experiments in fluids 2024-02, Vol.65 (2), Article 18
Hauptverfasser:	Gillespie, Graeme I., Laurence, Stuart J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic attenuation Acoustic noise Acoustic propagation Acoustics Amplitudes Attenuation coefficients Carbon dioxide Compressible boundary layer Differential interferometers Disturbances Engineering Engineering Fluid Dynamics Engineering Thermodynamics Fluid- and Aerodynamics Frequency ranges Gas mixtures Heat and Mass Transfer Porous plates Power spectral density Research Article Shock tunnels Turbulence Turbulent boundary layer Wave packets Wave propagation
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